Answer:
1.

2.

3.

Step-by-step explanation:
1. The given polynomial is

We need to factor the second part to get:

We factor y-5 to obtain:

2. We have

We again factor -1 from the second part to get:

We now factor x-y to get:


3. We have

We factor negative 1 from the first part to get

We now factor b-3 to get:

We now simplify to get:

90-n=3n
90=4n
22.5=n
Final answer 22.5
This is what my calculator says
It means not to get too invested in details or to become so invested in something that you can’t focus on anything else.
Answer:
-6.5
Step-by-step explanation:
x + 3.6 = -2.9
x= -6.5